Refrigerating apparatus



G; A. GASE.

REFRIGERATING APPARATUS. APPLICATION FILED MAR. 14, 1919.

fizz/522102- J gYML My G. A. GASE.

v HEFRIGERATING APPARATUS.

APPLICATION FILED MAR. 14, I919.

Patentd Mar. 1, 1921.

2 SHEETS-SHEET i,369,8OOA

UNHTED srTEs PATENT OFFICE,-

cnonen A. we, or CLEVELAND, OHIO, ASSIGN'OR or-oNE- rnmn '10 r. E. HERMAN,

OF CLEVELAND, OHIO.

REFRIGERATING APPARATUS.

Specification of Letters Patent.

Application filed March 14, 1919. Serial No. 282,814.

To all whom it may concern:

Be it known that I, 'GEORGE A. GASE, a citizen of ,the United States, residing at Cleveland, in the county of Cuyahoga, and State ofOhio, have invented a certain new and useful Improvement in Refrigerating Apparatus, of which the following is a full,

clear, and exact description.

This invention relates to a refrigerating apparatus, and is more particularly intended for household or store installations which require that the refrigerating system shall of the user.

be compact, taking up as small aspace as possible.

The object of the invention is to provide a system of few parts, simple in construction and operation, and which requires a minimum amount of attention upon the part .reservoir. At the topof the tank 1 there is a pipe 2 which by means of a T connects with the pipe 3 which pipe in turn is connected with the intake end of a compressor 4. This compressor may be of any desired type, and as a very efiicient form of compressor usable in combination with this system I have shown a compressor in my copending application Serial No. 394,639,fi1ed July 8, 1920. The compressor is driven by a motor such as indicated at P which is connected with the operating part of the compressor in any desired manner.

The compressor at the outlet end thereof connects with a pipe 5 which in turn is connected with a coil 6. This coil serves as a cooling coil for the compressed refrigerating gas, and at its lower end the coil is connected with a container 7 which container serves as a holder or reservoir for the liquefied refrigerating medium.

Within the container 7 there extends .a

the container to a point adjacent the bottom thereof, and upon the outside of the contalner the pipe 8 continues as indicated at 9, (see Fig. 2) and leads to and is connected with an expansion coil 10, (see Fig. 2).

The lower end of the expansion coil is connected by means of a pipe 11, (see Fig. 2), with the pipe 2 and the pipe 2 is in turn connected by means of a suitable T with a pipe 12 which connects with the tank 1, at the lower portion thereof.

As a refrigerating medium I prefer to use ammonia, and shall proceed to describe the operation of the apparatus assuming that ammonia is the refrigerating medium. However, I do not wish to be limited in this particular, and it will be apparent that other refrigerating medium may be used.

The absorber tank 1 contains a solution which preferably about half fills the tank, and this solution contains ammonia gas. When thecompressor is operated suction is created within the upper part of the abpipe 8, this pipe extending from the top of sorber which causes. the ammonia gas to be given up from the solution contained in the absorber, which ammonia gas passes to the compressor and is there compressed. The gas in its compressed state is delivered from the compressor and discharges through the pipe 5 into the coil 8 where the compressed gas is cooled in a manner which will be subsequently described.

As the compressed gas descends through the coil 8 it becomes cooler, and at the lower portion of the coil 8 it begins to liquefy and discharges into the container 7.

The liquefied gas is contained within the container 7 and finds exit from the container through the pipe 8 and the pipe 9, (see Fig. 2) to the expansion coil, where as is very well known the gas is allowed to expand through asuitable. expansion valve such as indicated at 10" so that the pressure is relieved, whereby the expanding liquefied gas absorbs heat from the atmosphere surrounding the expansion coil 10, and the condition of the liquefied gas is changed to a gaseous body and passes from the lower end of the expansion coil through the pipe 11 to the pipe 2.

The gas returning from the expansion coil is of course subjected to the action of the compressor, and will at least in part pass directly through pipe 3 and so to the compressor, and when in the normal operation of the system a sufiicient amount of gas has been withdrawn from the solution in the absorber to satisfy the requirements of the system, the gas makes a circuit from the expansion coil to the compressor, thence to the expansion coil 10 is in excess of the re-.

quirements of the compressor, then that portion of the gas which is in excess passes through the pipe 12 and into the solution within the tank, in which it is absorbed.

I The water which is thus supplied to the ab- The absorber tankl is contained within a receptacle 15,'this receptacle being adapted to contain water for the purpose of maintaining the absorber tank 1 in cooled condition. Above the tank 1 there is mounted a tank 16, and this tank is provided with a partition 17, (see Fig. 1), of less height than the walls of the tank so that there is provided a compartment within which the coil 6 and the container 7 are housed. This partition 17 also provides another compartment, within which the compressor is housed. Water is admitted to the tank 16 and to that compartment which houses the coil 6 by means of an inlet pipe 18. The water fills this compartment andoverfiows the 'par tition 17, and passes into the compartment which houses the compressor. Within the compartment housing the compressor, there is a stand-pipe. 19 which passes through the bottom of. the casing 16 and extends to a point at the lower portion of the casing 15. The stand-pipe 19 extends substantially to the top of the compressor so that water which is within the compartment housing the compressor stands at a level to substantially completely cover the compressor. The water finds exit through the pipe 19 and 1nto the casing 15, and from the casing 15 the water discharges through an outlet or waste pipe 20 which is located near the upper portion of the casing 15. It will be apparent that from the foregomg the coldest Water is admitted to the compartment which contains the liquid gas receptacle 7. This is for the purpose of insuring that the compressed, cold gas will be maintained in liquefied condition. The water which is discharged from this compartment next finds its way into the compartment in which the compressor is housed so that the next coldest water is used to cool the compressor, and in the last instance the water passes to the tank containing the absorber.

sorber is suflicient for cooling the absorber, so that the gas which may be discharged aacaaoo through the pipe 12 into the absorber will be absorbed by the solution.

In Fig. 2 I have shown a modified form of connection between the compressor and the.

cooling coil in which the pipe which leads from the compressor is connected so as to pass within the absorber, and that portion of the pipe which lies within the absorber is formed as a coil 22. From the coil 22 there is a pipe 24; which is connected with the top of the cooling coil 6.

The arrangement to which reference has just been made is substantially the same as that in Fig. 1, with the exception that the gas from the compressor is passed through the absorber by means of a coil in the absorber tank, before it is discharged into the cooling coil 6.

This construction accomplishes two results. In the first place, the compressed gas which, of course, is heated, due to the compression, imparts a certain amount of. heat to the ammonia, solution in the absorber,

thereby efiecting a more ready release of ammonia gas from the solution, and in the second place, the compressed gas which is passing through the coil 22 within the ab, sorber, is cooled, thus providing initial and additional cooling action to that'which the gas receives in passing through the coil 6.

It will be understood that the pipe 22 and the coil 23 have no connection with the solution within the absorber, but is merely passed through the absorber and in contact with the solution in the absorber for the purposes which have been mentioned.

A very important feature of the system which is herein disclosed, lies in the fact that when the compressor stops its action there is no opportunity for high pressure to build up in the system.

This is due to the fact that the absorber is connected not only with the compressor but1 with the return line from the expansion co1 In the event that the compressor stops its operation, the liquid' ammonia which is in the cooling coil 6 .and the reservoir 7 passes through the pipe 9- and the expansion coil 10, and because of the fact that the compressor is not in action, the gas passes to the absorber and is absorbed by thesolution within the absorber.

This is important, for if the absorber was not present, then the liquid ammonia expanding through the coil tank would build up a high pressure within the system and which might be a source of considerable .damage, causing a leak to occur in the line,

due to the pressure, but with the absorber connected in the system as indicated, the solution within the absorber will readily take up the gas.

The presence of the absorber in the system insures that even when the compressor ceases to operate, there will be no pressure within the system above that which was impressed upon the contents of the absorber in order to secure the desired degree of saturation.

Having described my invention, I claim:

1. A closed refrigerating apparatus comprising an absorber, a compressing means connected to the absorber, a cooling conduit connected to the compressing means, an expansion coil connected to the cooling conduit, and a connecting conduit means from the coil to the absorber.

2. A closed refrigerating apparatus comprising an absorber, a compressing means connected to the absorber, a cooling conduit connected to the compressing means, an expansion coil connected to the cooling conduit, and a connecting conduit means from the expansion coil to the compressing means. 3. A closed refrigerating apparatus comprising an absorber, a compressing means connected to the absorber, a cooling conduit connected to the compressing means, an expansion coil connected to the cooling conduit, a'connecting conduit means from the expansion coil to the compressor, and a second connecting conduit means communicating with the connecting conduit means just mentioned and the absorber.

'4. A closed refrigerating apparatus comprising an absorber, a compressing means connected to the absorber, a cooling coil connected to the compressing means, a reservoir connected to the cooling coil, an expansioncoil connected with the reservoir, and a connection conduit between the expansion coil.

and compressor and the absorber.

5. A closed refrigerating apparatus comprising an absorber, a compressing means connected with said absorber, a cooling coil connected with said compressing means, a

'reservoir connected atits lower end with one end of said coil, an expansion coil and a connecting conduit means connecting the compressor and also theabsorber.

6. A closed. refrigerating apparatus com prising an absorber, a compressor connected to the upper end of the absorber, a cooling coil connected with the compressor, a closed reservoir connected at its lower end with one end of the cooling coil, a pipe extending from the lower end of the reservoir to the outside, an expansion coil connected with said pipe, and connecting conduit means between the expansion coil and the compressor and the lower end of the absorber.

7. A closed refrigerating apparatus comprising an absorber, a compressor connected to the absorber, a conduit connected with the compressor, said conduit extending through the absorber, a cooling coil connected with the conduit, a reservoir connected with the cooling coil, an expansion coil connected with the reservoir, and conduit means connecting the expansion coil and absorber.

8. A closed refrigerating apparatus comprising an absorber, a tank within which the absorber is located, a compressor located in said tank, conduit means connecting the compressor with the absorber, a partition in the second tank, a cooling coil located in the second tank and separated from the compressor by the said partition a reservoir located within the said cooling coil and connected therewith, a conduit connecting the compressor with the cooling coil, an expansion coil connected with the reservoir and means connecting the expansion coil with the absorber, means for admitting a cooling fluid to the lower end of the second tank in which the cooling coil is located, said partition being of such height that water may overflow the partition into the part of the tank containing said compressor, a stand-pipe located in the second tank adjacent the compressor, said stand-pipe communicating with the first tank at the lower partition thereof, an outlet from the second tank adjacent the upper part of said tank, and conduit means connecting the expansion coil with the compressor and with the absorber.

In testimony whereof, I hereunto afiix my signature.

' GEORGE A. GASE. 

